Effect of shock stress amplitude on the post-shock mechanical response and substructural evolution of Ti–6Al–4V alloy

Ren, Yu; Zhang, Xue; Luo, Wenbo; Ren, Yuejuan

doi:10.1016/j.mechmat.2017.10.006

Cited by 7 publications

(4 citation statements)

References 20 publications

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“…Namely, compared with the work hardening caused by the uniaxial stress compression, the shock-induced strengthening effect in Ti64 is weaker even if the preshock stress ( X σ ) exceeds 12 GPa and the reloading strain rate attains 4×10 3 s -1 . This result is similar to that obtained during the quasi-static reload compression tests [10].…”

Section: Resultssupporting

confidence: 90%

“…Shock wave propagation will dramatically change the microstructure, which strongly influences the mechanical properties of materials [8,9]. Our previous study [10] has proved that the quasi-static mechanical properties of Ti64 at room and elevate temperatures alter significantly after shock prestrained. However, the effect of microstructural details on the dynamic mechanical behavior of the postshock Ti64 alloy is not yet clear.…”

Section: Introductionmentioning

confidence: 98%

“…The thickness of flyer plates ranged from 4.14-4.42 mm to ensure constant loading pulse duration of about 1.5 μs. Other details of the soft shock recovery experimental procedures were described in our previous work [10].…”

Section: Introductionmentioning

confidence: 99%

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Effects of Microstructure and Shock Prestrain on the Dynamic Mechanical Behavior of Ti-6Al-4V Alloy

Zhou

Wang

Ren

2020

KEM

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Ti–6Al–4V alloy (Ti64) with different microstructures was first preshocked at ~6–13 GPa and then compression reloaded at 4×103s-1 to investigate the effect of microstructure and shock prestrain on the dynamic mechanical behavior of this alloy. The strengthening effect caused by shock prestrain is weaker than that introduced by the uniaxial stress compression during dynamic reloading process regardless of microstructure type and impact stress amplitude. However, the shock-induced enhancement ratio is higher in Ti64 having bimodal microstructures or the lamellar microstructure with wide α-platelets. These mechanical behaviors exhibited by postshock materials are closely related to the shock-induced microstructure evolution. Dislocations more tend to nucleate and interact in large-sized α phases such as equiaxed primary α and wide α-platelets. The generation of high-density micro-defects during the propagation of shock waves results in the improvement of strength but degradation of ductility of Ti64 during dynamic reloading process.

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Section: Resultssupporting

confidence: 90%

Section: Introductionmentioning

confidence: 98%

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Effects of Microstructure and Shock Prestrain on the Dynamic Mechanical Behavior of Ti-6Al-4V Alloy

Zhou

Wang

Ren

2020

KEM

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“…Shock experiments have yet to verify the α → ω transition in Ti64 [24][25][26][27][28][29][30] though this may be due to the difficulty in detecting the small volume change across the phase boundary [24,26]. Sollier et al [29] shock compressed Ti64 up to 52 GPa and observed a dip in the release isentrope at ∼27 GPa.…”

Section: Introductionmentioning

confidence: 99%

The phase diagram of Ti-6Al-4V at high-pressures and high-temperatures

MacLeod¹,

Errandonea²,

Cox³

et al. 2021

J. Phys.: Condens. Matter

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We report results from a series of diamond-anvil-cell synchrotron x-ray diffraction and large-volume-press experiments, and calculations, to investigate the phase diagram of commercial polycrystalline high-strength Ti-6Al-4V alloy in pressure–temperature space. Up to ∼30 GPa and 886 K, Ti-6Al-4V is found to be stable in the hexagonal-close-packed, or α phase. The effect of temperature on the volume expansion and compressibility of α–Ti-6Al-4V is modest. The martensitic α → ω (hexagonal) transition occurs at ∼30 GPa, with both phases coexisting until at ∼38–40 GPa the transition to the ω phase is completed. Between 300 K and 844 K the α → ω transition appears to be independent of temperature. ω–Ti-6Al-4V is stable to ∼91 GPa and 844 K, the highest combined pressure and temperature reached in these experiments. Pressure–volume–temperature equations-of-state for the α and ω phases of Ti-6Al-4V are generated and found to be similar to pure Ti. A pronounced hysteresis is observed in the ω–Ti-6Al-4V on decompression, with the hexagonal structure reverting back to the α phase at pressures below ∼9 GPa at room temperature, and at a higher pressure at elevated temperatures. Based on our data, we estimate the Ti-6Al-4V α–β–ω triple point to occur at ∼900 K and 30 GPa, in good agreement with our calculations.

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Role of Microstructure on the Shock-Induced Strengthening Behavior of Ti–6Al–4V Alloy

Ren

Lin

2020

Met. Mater. Int.

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Effect of shock stress amplitude on the post-shock mechanical response and substructural evolution of Ti–6Al–4V alloy

Cited by 7 publications

References 20 publications

Effects of Microstructure and Shock Prestrain on the Dynamic Mechanical Behavior of Ti-6Al-4V Alloy

Effects of Microstructure and Shock Prestrain on the Dynamic Mechanical Behavior of Ti-6Al-4V Alloy

The phase diagram of Ti-6Al-4V at high-pressures and high-temperatures

Role of Microstructure on the Shock-Induced Strengthening Behavior of Ti–6Al–4V Alloy

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